Line-insulator



PATENTED FEB. 9, 1904.

C. C. CHESNEY. LINE INSULATOR.

vAPPLICATION FILED JAN. 14, 1903.

I0 KODBL.

Y V.. w W i m Y #H a Y A WITNESSES UNITED STATES Patented February 9, 1904.

PATENT OEEICE.

LINE-INSULATOR.

SPECIFICATION forming part of Letters Patent No. 751,459, dated February 9, 1904.

Application filed January 14. 1903.

To (il/ZZ whom t may concern:

Beit known that I, CUMMINGs C. CHEsNEY, of Pittsfield, county of Berkshire, and State of Massachusetts, have invented certain new and useful Improvements in Line-Insulators, of which the following is a specification.

My invention relates to line-insulators; and, generally speaking,the object thereof is to provide an improved characterl of insulator especially adapted for extremely high potentials. To this end I have provided an insulator having the general shape of a letter H.. The linewire is secured to the center of the connectingarm of the H, while the insulator as a whole is supported from the ends by the two parallel legs of the H. Moreover, my improved insulator is composed of several insulators or sets thereof set at an angle to each other to form the H shape and preferablyT mounted on rods the two parallel ends of which are supported by suitable means, while the cross-rod is clamped at each end about the two parallel insulators or sets thereof. The central insulator, to which the line-wireis connected, is so mounted on a rod or shaft as to be free to rotate, so that the wire may yield slightly to longitudinal movement. By these means there is provided a very long leakage-surface from the line-wire to every point of support, and at the same time the insulators are not of such length as to be liable to breakage. Moreover, if either of the individual insulators should break or prove defective such insulator may be readily renewed without disturbing the other insulators. In short, the insulator while provided with a maximum length of leakage-surface is compact and stanch and readily reparable. The loose mounting of the central insulator is also an important feature of my invention, since it equalizes to a considerable extent the tension on the line-wire, while' relieving the insulator from strain.

Referring to the drawings, Figure l is a side elevation of an embodiment of my invention. Fig. 2 is a plan view thereof, and Fig. 3 is an end elevation of the same.

l A illustrates an ordinary pole from which is supported the cross-arm A. To this crossarm are secured by bolts two pairs, B and Serial No. 138,999. (No model.)

B', of arms. These arms support rods c and c', (shown in dotted lines in Fig. 2,) and upon these rods are mounted two parallel insulators D and D. The ends of the arms B and B engage the rods at the ends of the insulators.

Loosely mounted on a rod c2, which rod is screwed, as indicated at Z and 6W, to the clamp members E E, is an insulator D2, which thus lies between and at right angles to the parallel insulators D and D'. The clamp members E E are secured to clamp members E/ E by bolts e, as shown, said clamps surrounding the,

central portions of insulators D and D'. The line-wire F is secured by any suitable means to the center of insulator D2. l

It will be .seen that my invention comprises several features of advantagethe general H shape, the loose mounting of the wire-carrying insulator, as well as other features of construction and arrangement, as described and claimed. I do not, of course, limit myself to the employment of these various features in one structure nor to the mere details described and illustrated.

Having thus fully described my invention, what I claim, and desire to protect by Letters Patent, is-

1. An H-shaped insulating-support composed of a plurality of insulators set at an angle to each other.

2. An H-shaped insulating-support composed of a plurality of insulators set at an angle to each other and means for securing the several insulators together to form a unitary structure.

3. rlhe combination of an insulator comprising two parallel legs and a connecting-leg supported from the middle portions of said parallel legs, a line-wire secured to the connecting-leg, and arms supporting the insulator from the ends of its parallel legs.

4. The combination of supporting arms,

`rods carried between saidA arms, insulators mounted on said rods, and an insulator lying between and supported from the middle portions of the aforesaid insulators.

5. In combination, two tubular-shaped insulators, a rod supported between the middle portions of said insulators, and a third tubularl-shaped insulator loosely mounted on said IOC 6. In combination, two rods, two tubularshaped insulators mounted thereon, a third rod supported on the middle portions of said insulators and a third tubular-shaped insulator loosely mounted on said rod.

7. An insulating-support Composed of three individual insulators lying in the same hori- Zontal plane, one of said insulators lying between and supported from the middle portions of the others.

8. The combination of three insulators lying in the same horizontal plane, arms supporting two of said insulators from the ends thereof, and means for supporting1 the other insulator from the middle portions of the said two insulators.

9. The combination of three rods lying in 20 

